China’s search for new energy sources has set back the cause of human rights in Africa, advocates say, but some analysts argue that China’s investment is just part of the worldwide competition for oil... [China's] energy expansion has proved most controversial in Africa, where China has been blamed for channeling funds into corrupt governments and civil wars...Sudan and Angola have raised the biggest concerns. [refers to China National Petroleum Corp (CNPC), Greater Nile Petroleum Operating Company, Sinopec]